Devcon Maintenance and Repair Solutions - Sintemar

Field Application Reports
Products:
Application Date:
Customer:
Industry:
Location 71
Ball Mill Cover Repair
Wear Guard Fine Load, Irathane® 155
01/15/02
South American Copper/Gold mine
Mining
Problem :
Customer had imported used equipment for a their third milling line. The ball mill was very eroded on
all surfaces, including these end covers, due to failures in the coating between liner and shell, which
allowed leakage of the pulp. Worn areas were rebuilt to original dimensions using Wear Guard Fine
Load and the whole surface was coated with Irathane 155 as protection against future potential liner
failure.
Solution:
Surfaces were blasted to white metal (SSPC-SP5.) They were then cleaned using Cleaner Blend 300,
and allowed to dry. Eroded areas were rebuilt using Wear Guard Fine Load beaded epoxy. Within 4
hours, surfaces were primed with SA-200 applied with airless spray equipment. This was allowed to
cure for three hours, and Irathane 155 was applied with 42:1 ratio airless equipment. Two coats of 155
were applied, for a total DFT of 2.5 mm, to prevent problems in the future.